CVE-2025-9269 Overview
CVE-2025-9269 is a Server-Side Request Forgery (SSRF) vulnerability in the embedded web server of multiple Lexmark devices. An unauthenticated remote attacker can coerce the affected device to send arbitrary HTTP requests to third-party or internal systems. Successful exploitation enables internal network reconnaissance and potential data disclosure from the device itself. The vulnerability is tracked under CWE-918: Server-Side Request Forgery and requires no privileges or user interaction. Lexmark has published information in its Lexmark Security Advisory portal.
Critical Impact
Unauthenticated attackers can pivot through affected Lexmark printers to reach internal network resources and extract data accessible to the device.
Affected Products
- Lexmark multifunction printers with the affected embedded web server
- Lexmark single-function printers with the affected embedded web server
- Refer to the vendor advisory for the complete list of impacted models and firmware versions
Discovery Timeline
- 2025-09-09 - CVE-2025-9269 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-9269
Vulnerability Analysis
The flaw resides in the embedded web server that ships with affected Lexmark devices. The web server accepts a request containing a URL or host parameter and issues an outbound HTTP request without adequately validating the destination. An attacker on the network path to the printer can direct that outbound request to arbitrary endpoints, including internal hosts unreachable from outside the network.
Because the request originates from the printer, it inherits the network trust and routing position of that device. This is characteristic of SSRF flaws classified under CWE-918, where the server acts as a proxy for attacker-controlled requests.
The scope covers the printer as the confused deputy. An attacker can enumerate internal services, probe internal HTTP endpoints, and in some cases retrieve responses that disclose data reachable from the device.
Root Cause
The embedded web server does not enforce a strict allowlist on destinations for outbound HTTP requests. Input validation fails to restrict schemes, hostnames, or IP ranges, so requests to loopback, link-local, and internal RFC1918 addresses proceed unimpeded.
Attack Vector
Exploitation occurs over the network with no authentication and no user interaction. The attacker submits a crafted HTTP request to the printer's embedded web interface, supplying a target URL. The device then issues an HTTP request to that URL and, depending on the endpoint invoked, may return response data or metadata to the attacker.
Typical abuse scenarios include scanning internal subnets, reaching management interfaces on other devices, and touching cloud metadata endpoints when the printer is deployed in a segmented cloud environment. Technical specifics for reproduction are not published by the vendor at this time.
Detection Methods for CVE-2025-9269
Indicators of Compromise
- Outbound HTTP requests originating from printer IP addresses toward internal hosts or unusual external destinations
- Repeated printer-sourced requests to sequential internal IPs, indicating network scanning behavior
- Unexpected access log entries on internal web services showing a printer user-agent or source IP
Detection Strategies
- Baseline normal outbound traffic patterns from print infrastructure and alert on deviations, particularly requests to non-print-related services
- Inspect HTTP request logs on the embedded web server for parameters containing URLs or IP addresses submitted by unauthenticated sessions
- Correlate printer network flows with internal service access logs to identify SSRF-driven reconnaissance chains
Monitoring Recommendations
- Forward printer network flow data and syslog to a centralized analytics platform for behavioral analysis
- Monitor for connections from printer VLANs to cloud metadata IPs such as 169.254.169.254 and to internal management subnets
- Track authentication failures and configuration changes on the embedded web server to detect follow-on activity
How to Mitigate CVE-2025-9269
Immediate Actions Required
- Consult the Lexmark Security Advisory portal and apply the firmware update for your device model
- Restrict management access to the embedded web server to trusted administrative networks only
- Place printers in a dedicated VLAN with egress filtering to prevent arbitrary outbound HTTP requests
Patch Information
Lexmark distributes firmware updates for affected models through its security advisories page. Administrators should identify each affected model in the environment, locate the corresponding firmware bulletin, and deploy the updated firmware following Lexmark's documented procedures.
Workarounds
- Block outbound HTTP and HTTPS traffic from printer subnets to internal management ranges and cloud metadata endpoints at the firewall
- Disable any embedded web server features that accept user-supplied URLs if operationally acceptable
- Enforce network segmentation so printers cannot reach sensitive internal services directly
# Example egress ACL restricting printer VLAN outbound HTTP
# Adjust interface, VLAN, and address ranges for your environment
access-list PRINTER_EGRESS deny tcp 10.20.30.0 0.0.0.255 10.0.0.0 0.255.255.255 eq 80
access-list PRINTER_EGRESS deny tcp 10.20.30.0 0.0.0.255 10.0.0.0 0.255.255.255 eq 443
access-list PRINTER_EGRESS deny tcp 10.20.30.0 0.0.0.255 host 169.254.169.254 eq 80
access-list PRINTER_EGRESS permit tcp 10.20.30.0 0.0.0.255 any eq 443
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
